Zoltek Companies, Inc. : Zoltek Reports Second Quarter Results

        Zoltek Companies, Inc. : Zoltek Reports Second Quarter Results

FOR IMMEDIATE RELEASE

ST. LOUIS, MISSOURI - May 10, 2013 - Zoltek Companies Inc. (Nasdaq: ZOLT)
today reported financial results for the second quarter of its 2013 fiscal
year.

Zoltek's net revenues for the quarter ended March 31, 2013, totaled $33.3
million, compared to $47.0 million in the second quarter of fiscal 2012, a
decrease of 29.1%. On a sequential quarter basis, net revenues for the latest
quarter were down 7.2% compared to $35.9 million from first quarter of the
current year.

Zoltek reported net income of $3.3 million for the second quarter of fiscal
2013, which included a gain of $1.7 million from foreign currency
transactions. By comparison, in the second quarter of the prior year, Zoltek
reported approximately the same net income ($3.3 million), but that included a
loss of $1.9 million on foreign currency transactions.

The Company's operating income was $1.7 million in the latest quarter,
compared to operating income of $5.7 million in the second quarter of fiscal
2012 and operating income of $3.6 million in the first quarter of the current
year.

For the six months ended March 31, 2013, Zoltek's net sales were $69.2
million, compared to $94.0 million in the first six months of fiscal 2012, a
decrease of $26.4%. Operating income for the first half of fiscal 2013 was
$5.4 million, compared to $13.9 million in the first half of fiscal 2012. Net
income for the first six months of fiscal 2013 was $6.3 million, compared to
$13.0 million in the first six months of the prior year.

"Almost the entire decline in our sales in the first half of the year was the
result of reduced activity in the wind energy market, which has negatively
affected all industry participants - from the suppliers of glass and carbon
fibers and other materials to the manufacturers of wind turbines," said Zsolt
Rumy, Zoltek's Chairman and Chief Executive Officer. "This sudden decline in
the industry is reflecting the pull-forward of orders into late 2012." Zoltek
continues to be the world's largest supplier of carbon fibers used in the
manufacture of the biggest and most advanced wind turbines, including those
used in the building of large offshore wind farms.

Despite the sharp drop in the sales over the first half of the year, Rumy
pointed out that Zoltek remained profitable in the second quarter - marking
the 7 consecutive quarters of positive earnings for the Company. "We are a
healthy company with a strong balance sheet," Rumy said. "We are disappointed
with the sudden and (we believe) temporary drop in demand from new energy
generation. Meanwhile, we continue to make solid progress in our long-term
efforts to develop new applications for our low-cost carbon fibers in other
fields - most especially automotive, consumer electronics, electrical
transmission lines and pressure vessels which we expect to become a major new
source of growth within the next two years and beyond."

Rumy also announced that although the Company continues to hold quarterly
investor conference calls, for the time being it is discontinuing the Q&A
portion of the calls. "As we announced on April 2^nd, we are exploring and
evaluating strategic alternatives to maximize shareholder value," Rumy said.
The Company does not intend to announce further developments regarding the
process until the Board of Directors either completes its review or enters
into a definitive agreement for a possible transaction.

Zoltek will host a conference call to review its second quarter results on
Monday, May 13, 2013 at 10:00 am CT. The conference dial-in number is (888)
481-2844. The confirmation code is 3613523. Individuals who wish to
participate should dial in 5 to 10 minutes prior to the scheduled start time.
This conference call will also be webcast on Zoltek's website-
www.zoltek.com- under "Investor Relations." The webcast replay will be
available on the website several hours after the call.

                           * * *

This press release contains certain statements that constitute
"forward-looking statements" within the meaning of Section 27A of the
Securities Act of 1933, as amended, and Section 21E of the Securities Exchange
Act of 1934, as amended. The words "expect," "believe," "goal," "plan,"
"intend," "estimate," and similar expressions and variations thereof are
intended to specifically identify forward-looking statements. Those statements
include statements regarding the intent, belief or current expectations of us,
our directors and officers with respect to, among other things: (1) our
financial prospects; (2) our growth strategy and operating strategy, including
our focus on facilitating acceleration of the introduction and development of
mass market applications for carbon fibers; and (3) our current and expected
future revenue. This press release also contains statements that are based on
the current expectations of our company. You are cautioned that any such
forward-looking statements are not guarantees of future performance and
involve risks and uncertainties, and that actual results may differ materially
from those projected in the forward-looking statements as a result of various
factors. The factors that might cause such differences include, among others,
our ability to: (1) successfully adapt to recessionary conditions in the
global economy and substantial volatility in order rates from our wind energy
customers, including our principal customer Vestas Wind Systems; (2) penetrate
existing, identified and emerging markets, including entering into new supply
agreements with large volume customers; (3) continue to improve efficiency at
our manufacturing facilities on a timely and cost-effective basis; (4)
successfully add new planned capacity for the production of carbon fiber,
prepregs and precursor raw materials and meet our obligations under long-term
supply agreements; (5) operate profitably; (6) increase or maintain our
borrowing at acceptable costs; (7) manage changes in customers' forecasted
requirements for our products; (8) continue investing in application and
market development for a range of applications; (9) manufacture low-cost
carbon fibers and profitably market them despite fluctuations in raw material
and energy costs; (10) successfully operate our Mexican facility to produce
acrylic fiber precursor and carbon fibers; (11) successfully continue
operations at our Hungarian facility if natural gas supply disruptions occur;
(12) successfully prosecute patent litigation; (13) successfully facilitate
adoption of our carbon fibers by the auto industry for use in high-volume
applications; (14) establish and grow prepreg capacity; (15) speed development
of low-cost carbon fiber sheet molding compounds for the automotive industry
pursuant to our global collaborative partnership with Magna Exteriors and
Interiors; (16) resolve possible disputes with a group of shareholders that
filed a Schedule 13D reporting beneficial ownership of an aggregate of
approximately 10.1% of our outstanding common stock, including the group's
request for a special shareholders meeting to remove the current Board of
Directors and elect new directors; (17) successfully pursue the announced
process for exploring strategic alternatives to maximize shareholder value;
and (18) manage the risks identified under "Risk Factors" in our filings with
the SEC. Because forward-looking statements are inherently subject to risks
and uncertainties, some of which cannot be predicted or quantified, you should
not rely upon forward-looking statements as predictions of future events. The
events and circumstances reflected in the forward-looking statements may not
be achieved or occur and actual results could differ materially from those
projected in the forward-looking statements.

                       For further information contact:
                             Andrew Whipple, CFO
                              3101 McKelvey Road
                             St. Louis, MO 63044
                                (314) 291-5110

Q2-2013 Summary Financials

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Source: Zoltek Companies, Inc. via Thomson Reuters ONE
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